package com.sondon.mayi.util;

import android.content.Context;
import android.os.Environment;
import android.os.StatFs;

import java.io.File;

public class CommonUtil {

    /**
     * 检测sdcard是否可用
     *
     * @return true为可用，否则为不可用
     */
    public static boolean sdCardIsAvailable() {
        String status = Environment.getExternalStorageState();
        if (!status.equals(Environment.MEDIA_MOUNTED))
            return false;
        return true;
    }

    /**
     * Checks if there is enough Space on SDCard
     *
     * @param updateSize Size to Check
     * @return True if the Update will fit on SDCard, false if not enough space on SDCard Will also return false, if the SDCard is
     * not mounted as read/write
     */
    public static boolean enoughSpaceOnSdCard(long updateSize) {
        String status = Environment.getExternalStorageState();
        if (!status.equals(Environment.MEDIA_MOUNTED))
            return false;
        return (updateSize < getRealSizeOnSdcard());
    }

    /**
     * get the space is left over on sdcard
     */
    public static long getRealSizeOnSdcard() {
        File path = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
        StatFs stat = new StatFs(path.getPath());
        long blockSize = stat.getBlockSize();
        long availableBlocks = stat.getAvailableBlocks();
        return availableBlocks * blockSize;
    }

    /**
     * Checks if there is enough Space on phone self
     */
    public static boolean enoughSpaceOnPhone(long updateSize) {
        return getRealSizeOnPhone() > updateSize;
    }

    /**
     * get the space is left over on phone self
     */
    public static long getRealSizeOnPhone() {
        File path = Environment.getDataDirectory();
        StatFs stat = new StatFs(path.getPath());
        long blockSize = stat.getBlockSize();
        long availableBlocks = stat.getAvailableBlocks();
        long realSize = blockSize * availableBlocks;
        return realSize;
    }

    /**
     * 根据手机分辨率从dp转成px
     *
     * @param context
     * @param dpValue
     * @return
     */
    public static int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    /**
     * 根据手机的分辨率从 px(像素) 的单位 转成为 dp
     */
    public static int px2dip(Context context, float pxValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f) - 15;
    }

}
